Wavelength converter and green light source and projection apparatus using the same
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United States of America Patent
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Jun 19, 2012
Grant Date -
Jun 10, 2010
app pub date -
Dec 3, 2009
filing date -
Dec 10, 2008
priority date (Note) -
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Abstract
A wavelength converter includes a supporting substrate and a ferroelectric substrate, the ferroelectric substrate includes at least one waveguide facing the supporting substrate and at least one wavelength-filtering pattern positioned between the waveguide and the supporting substrate, the waveguide includes a plurality of inverted domains and non-inverted domains configured to convert an infrared light into a green light, and the infrared light emitted from the semiconductor laser enters the waveguide of the wavelength converter. For example, the wavelength-filtering pattern includes a Bragg grating.
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